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No DBI for BN Units
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If the D magnet valve becomes defective or if the exhaust port becomes blocked, Brake Cylinder pressure can remain even though DB is selected. <br /> <br />I have had BC pressure go from 0-350kpa instantly when coming out of DB. I believe the explanation was that air became trapped between the D magnet valve and the blocked exhaust port which, when I came out of DB, re-entered the Brake Cylinders. <br />All very good reason's to bail off when making an Automatic Application whether using DB or not. <br /> <br />Danny <br />Australia
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